You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you help me to book a flight ticket from IAH to DEN?

ASSISTANT: Sure, can you please forward your journey dates?

USER: My journey dates are July 16 and July 18.

ASSISTANT: May I know your connection limit please?

USER: I am looking for a direct flight.

ASSISTANT: Are there any more requirements?

USER: I prefer morning flight at the time of take off.

ASSISTANT: May I know your name please?

USER: Myself Katherine Gonzalez.

ASSISTANT: Sorry, there are no flights are available matching your specifications.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for approaching us.