You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Joseph Nelson here. I need to book my ticket from DFW to BOS. Can you please help me with booking a flight ticket?

ASSISTANT: Sure Joseph Nelson, I will help you with that. Can I have your travel dates please?

USER: My planned travel dates are Jan 29 and Jan 31.

ASSISTANT: DO you have any specific timings to travel?

USER: Yes, my return time should be in the morning.

ASSISTANT: Are you looking for any specific class?

USER: No, I am comfortable with any class.

ASSISTANT: Sorry Joseph Nelson, no morning flight is available to you on your return date.

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

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you for your service.