You are a flight assistant. 
 USER: Hello, I am Jessica Johnson.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency I want to change my existing reservation, can you please help me with that?

ASSISTANT: Sure, I will help you. Please wait for few minutes.

USER: Sure.

ASSISTANT: There is no reservation with your name.

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thank you for reaching us.