You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Gary Carter here. I heard that there is a heavy rains in my visiting place, I want to change my recent reservation.

ASSISTANT: Sure Gary, please wait a minute. I found reservation with your details, Gary. Please provide me your airport codes.

USER: My airport codes are from LGA to BOS.

ASSISTANT: May I know when are you planning your journey?

USER: I would like to travel from 06/01 to 06/03.

ASSISTANT: Gary, there are no flights available with your requested dates. Do you have any other dates of journey?

USER: No, thank you for support.

ASSISTANT: Thank you for choosing our agency. Have a nice day.