You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Thomas Perez.

ASSISTANT: How may I assist you, Thomas?

USER: I would like to hike at Camelback Mountains at Phoenix. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your respective airport codes please?

USER: My airport codes are from IAH to PHX.

ASSISTANT: Could you let me know your journey dates please?

USER: My planned dates are from 09/18 to 09/20.

ASSISTANT: Perez, there is a flight with Spirit airlines available with price 100. Shall I book the ticket?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1009.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a good day.