You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Moore.

ASSISTANT: How may I help you?

USER: I am planning to visit New York, can you please book me a ticket from IAH to JFK?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My preferable journey dates are from Mar 20 and Mar 22.

ASSISTANT: Do you have any other specifications?

USER: I prefer to return at afternoon time flight.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.