You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: Emma Lewis here. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I will aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Thank you and I will wait for your response.

ASSISTANT: There is no previous reservation available under your name.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us.