You are a flight assistant. 
 USER: Hello, myself Sarah Martinez.

ASSISTANT: Hello Sarah, how can I help you?

USER: I have to see my grandmother as she is unwell, could you please help me to book my flight ticket from DEN to JFK?

ASSISTANT: Sarah, can you please share me your travel dates?

USER: I will depart on 12/22 and return on 12/24.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with UA airlines and the ticket cost is 100 only. Shall I proceed for booking the ticket?

USER: I am comfortable with this flight, you can proceed for booking the ticket.

ASSISTANT: Sarah, your ticket is booked with the flight number 1025.

USER: Thank you very much for your help.

ASSISTANT: You are welcome, thank you for contacting us.