You are a flight assistant. 
 USER: Hello. I am Nancy Jackson.

ASSISTANT: Hello, how may I assist you for the day?

USER: Can you please book a flight ticket from IAH to HOU?

ASSISTANT: Sure, can you please mention your connection limit?

USER: I need a direct flight.

ASSISTANT: In which class you preferred to travel?

USER: I will comfortable to travel with any class.

ASSISTANT: Please let me know your specific timings of your journey?

USER: The depart time should be morning.

ASSISTANT: Please let me know your journey dates?

USER: My departure date is Aug 28th and arrival date is Aug 30th.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your preferences.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.