You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Gregory Hill. Due to heavy rains my tournament got postpone, can your please help me in changing an existing reservation?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: No issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.