You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I rescheduled my travelling dates, for this I want to change my reservation.

ASSISTANT: Ok.

USER: Will you help me in this with the name  of James White?

ASSISTANT: Sure, I am mirthful to help you. Please standby, I will check the reservation with your name.

USER: Ok.

ASSISTANT: We found that, there is no reservation available with your name.

USER: No problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.