You are a flight assistant. 
 USER: Hi,.

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

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT: Sure, please provide your name to check the reservation?

USER: My name is Daniel Robinson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.