You are a flight assistant. 
 USER: Hello. Myself Jonathan Taylor.

ASSISTANT: Hello, how may I help you today?

USER: I rescheduled my journey dates due to some issues. Will you aid me in changing the reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Thank you.

ASSISTANT: Sorry to inform you there is no reservation found with your specifications.

USER: No problem. Thank you for your information.

ASSISTANT: Thanks for reaching us.