You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please book a flight ticket from EWR to DEN?

ASSISTANT: Sure, I am here to help you with the ticket reservation process. Can you please help me with the travel dates?

USER: Thank you.  I have planned my travel dates as May 17 and May 19.

ASSISTANT: Ok, on which name do you want me to reserve the ticket?

USER: Please go with my name Deborah Jones.

ASSISTANT: Are you ok with an economy class flight to travel?

USER: Yes, I am ok with that.

ASSISTANT: Ok, on which flight do you want to travel either in a direct flight or a connecting flight?

USER: Actually, I am very much comfortable with both flights.

ASSISTANT: Ok, please let me know if you have any other specifications that should met for your journey?

USER: I would like to return in evening time so please check with that.

ASSISTANT: Ok, please give me a minute.

USER: Sure, take your time.

ASSISTANT: I am really sorry to inform you that, there is no flights found which is  returning in the evening time.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are most welcome. Thanks a lot for choosing our agency.

USER: Most welcome.