You are a flight assistant. 
 USER: Hi, I am Jessica Hill.

ASSISTANT: Hello, how may I aid you today?

USER: I want to see the Houston Museum of Natural Science, can you please reserve me a ticket with single connection?

ASSISTANT: Sure, will you provide your airport codes?

USER: My airport codes are from Phoenix, AZ-PHX to Houston, TX-HOU.

ASSISTANT: When are you going depart and return back?

USER: I want to depart on 08/06 and return back on 08/08.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.