You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Barbara Jones. I want to book a ticket from LAX to IAH to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am happy to provide you the service. May I know your travel dates of your journey?

USER: I am departing on 07/15 and return on 07/17.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to tell you that, I haven't found any flight in this route on the dates you have provided.

USER: That's ok, thank you for your information.

ASSISTANT: You are most welcome. Have a good day.