You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Rodriguez.

ASSISTANT: How may I help you?

USER: I would like to book a flight ticket from MCO to EWR, can you please assist me in making an airline reservation?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Dec 26th and Dec 28th.

ASSISTANT: Do you have any preference?

USER: The depart time should be afternoon.

ASSISTANT: Can I know your class?

USER: I don't have any class.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for choosing us.