You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Turner.

ASSISTANT: How may I aid you today?

USER: Can you help me in booking my flight ticket from SEA to DEN?

ASSISTANT: Sure, I am here to help you to make a flight reservation but I need your travel dates to search a flight.

USER: My trip dates will be June 15th to June 17th.

ASSISTANT: Please let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Could you please let me know your depart and return timings?

USER: I need a flight that should return in the evening.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.