You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I give assistance to you?

USER: I want to participate in Havasupai Adventure for trekking with my friends at Phoenix. Can you help me for booking?

ASSISTANT: Sure, we are mirthful to help you for booking. When do you want to start your journey?

USER: I would like to start my journey on 03/20.

ASSISTANT: Ok, let me know your return date.

USER: Ok, I intend to return on 03/22.

ASSISTANT: Can you please assign your source point?

USER: My nearest boarding airport is Houston, TX - IAH.

ASSISTANT: Ok, please specify the Phoenix airport code.

USER: The Phoenix airport code is AZ - PHX.

ASSISTANT: Ok, How much do you want to spend on your ticket?

USER: I can spend up to 5000.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, we found a flight in 1021 Spirit airline with a fare of 300 which matches to your criterion. Can I proceed for booking with a halt?

USER: Sure, you can proceed for booking.

ASSISTANT: To proceed further, may I know your name?

USER: Sure, I am Carolyn Garcia.

ASSISTANT: Ok, your E-ticket has been generated, it will sent to your registered Email-id.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for consulting our agency.