You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a ticket from IAH to SEA. Can you please help me out?

ASSISTANT: Sure, can I know your travelling dates?

USER: I am planning travel on Nov 05 and return back on Nov 07.

ASSISTANT: On which name should I reserve the flight ticket?

USER: My name is Barbara Roberts.

ASSISTANT: Do you have any other specifications?

USER: My depart time is morning and return time should be morning.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.