You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Adams.

ASSISTANT: How can I help you?

USER: I would like to book a flight ticket from DEN to JFK, will you please aid me in making an airline reservation?

ASSISTANT: Please provide your travel dates.

USER: I would like to depart on Sept 11th and return on Sept 13th.

ASSISTANT: Do you have any preferences?

USER: The return time should be morning.

ASSISTANT:  Do you have any other preferences?

USER: I need a single connection.

ASSISTANT: Sorry,  no flights are available on your desired routes.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.