You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Lisa Allen here.

ASSISTANT: How can I assist you?

USER: Can you please help me?

ASSISTANT: Yes, I can help you in booking the ticket. Can you please send me your respective airport codes?

USER: I want to travel from DEN to IAD.

ASSISTANT: Fine, may I know your travel dates please?

USER: Sure, my itinerary dates are 01/26 and 01/28.

ASSISTANT: Ok, please be on hold while I'll check your reservation status.

USER: Ok, take your time.

ASSISTANT: JetBlue airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: That's fine, please proceed for booking.

ASSISTANT: I have successfully booked your ticket with flight-1005, have a safe journey.

USER: Thank you for assisting me.

ASSISTANT: Thank you so much for choosing us.