You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Owing to emergency, I need to change my recent reservation. Please help me in that.

ASSISTANT: Sure, may I know your name?

USER: My name is Donald Rodriguez.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Nothing to worry, thanks for your information.

ASSISTANT: Thank you for reaching us.