You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I am Brenda King.

ASSISTANT: Nice to meet you King.

USER: I am looking for a flight with price 5000, can you please help me to book a ticket from JFK to BOS?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: I would like to travel on 12/31 and my return dates are 01/02.

ASSISTANT: Sorry, there is no flights in your requested dates.

USER: That's really sad to hear, but no problem I will try  other agency.

ASSISTANT: Ok.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.