You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Lopez.

ASSISTANT: What service that you are looking from our agency Nancy?

USER: I want to visit NASA space centre at Houston, TX - HOU. Can you please book a ticket from Seattle, WA - SEA?

ASSISTANT: Sure, I am oblige to help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of travelling?

USER: I have planned my journey dates are 11/18 to 11/20.

ASSISTANT: Please wait a moment to check the flights availability in your route.

USER: Sure, take your time.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Delta airlines. Shall I proceed with this?

USER: Please, make it confirm.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1008.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us, hope you have a great journey.