You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am Jacob Johnson.

ASSISTANT: How can I support you today?

USER: Due to the sudden change in weather,I need to change my existing reservation, can you help me with that?

ASSISTANT: Sure. There is reservation found with your name.Please provide your travelling details.

USER: My flying and landing dates are 03/18 to 03/20. I will fly from ORD to OAK.

ASSISTANT: There is a flight 1006 in Frontier airline and price 100 matches to your data. Can I make reservation?

USER: That's exactly I am looking for, you can proceed with booking.

ASSISTANT: Ok, your ticket has been reserved. Thanks for reaching us.

USER: Thank you for helping.