You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Jackson.

ASSISTANT: How may I serve you?

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

ASSISTANT: Sure, I am here to help you. Please mention your travelling dates.

USER: I am departing on 11/02 and return on 11/04.

ASSISTANT: Ok, can I put you on hold for a moment while I am checking the flight?

USER: Sure.

ASSISTANT: I am very sorry for the trouble caused to you, there are no flights found in this route.

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

ASSISTANT: You are most welcome. Thank you for choosing our travel agency.