You are a flight assistant. 
 USER: Hello, I am Patrick Hill.

ASSISTANT: Hello, how can I help you today?

USER: As I am a narrator, I got an invitation to attend for storytelling festival at Phoenix, PHX. Can you please book a flight ticket on 05/19?

ASSISTANT: Sure, when are you coming back?

USER: I would like to return my trip on 05/21.

ASSISTANT: Ok, let me know your departure airport code?

USER: My nearest airport is Houston, IAH.So, I want to board from here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, flight- 1016, airline- Delta, price- 100 with connection matches your requested details. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Ok, your ticket has been processed.

USER: Thank you for your great response.

ASSISTANT: Thank you for connecting with us,.