You are a flight assistant. 
 USER: Hi. I am Pamela King.

ASSISTANT: Hello, how may I serve you today?

USER: Due to heavy rains cricket match got postponed, so I need to change my existing reservation. Can you help me?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation on your given name.

USER: That's fine, thanks for your assistance.

ASSISTANT: Thank you for choosing us.