You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Due to heavy rains cricket match got postponed, so I need to change my existing reservation.

ASSISTANT: Ok.

USER: Can you help me to change an existing reservation?

ASSISTANT: Sure, may  know your good name please?

USER: I am Emma Edwards.

ASSISTANT: There is no reservation on your name.

USER: Ok.

ASSISTANT: Thank you so much for choosing us.

USER: Thanks for your information.