You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Nancy Martinez. I reserved a ticket to Botanical Gardens with my friends but unfortunately it has been postponed to some other date, so can you please help me in changing my existing reservation?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Thank you, take your time.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: No problem, thank you for the response.

ASSISTANT: Thanks for reaching us.