You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Clark.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from LAS to HOU to meet my uncle, can you help me in booking?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: I am departing on 07/14 and return on 07/16.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Clark, there are no flights available on your given dates.

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

ASSISTANT: You are welcome and have a nice day.