You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Martinez.

ASSISTANT: How can I help you today?

USER: I want to book a ticket from EWR to DEN to meet my uncle, can you help me in booking?

ASSISTANT: Ok, please share your travelling dates for this following journey.

USER: I am departing on 12/25 and return on 12/27.

ASSISTANT: Please wait for a moment Linda Martinez.

USER: Sure.

ASSISTANT: I am so sorry to tell you, there are no flights available on your request. Sorry for the inconvenience.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing our services, have a great day ahead.