You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you from flight booking agency?

USER: I want to alter my recent reservation due to heavy snowfall in Washington. Can you please help me?

ASSISTANT: Sure, I am glad to help you with this.

USER: Ok.

ASSISTANT: May I know your good name to check for the reservation status?

USER: Sure, my name is Amy Lewis.

ASSISTANT: Wait a moment please. Amy Lewis, I have found your reservation in our database. Can you please provide airport codes of travelling?

USER: My source and destination airport codes are PHL and DCA.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: Sure, my journey dates are from 05/09 to 05/11.

ASSISTANT: Flight-1009 is available on this route with a ticket fare of 100 only, shall I book your ticket?

USER: Please you can book the ticket.

ASSISTANT: Your ticket is confirmed successfully with JetBlue airlines.

USER: Thank you for your services.

ASSISTANT: Thank you, have a safe journey.

USER: Welcome.