You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: On which name your previous ticket has been reserved?

USER: My reservation was done under the name Brian Lewis.

ASSISTANT: Just give me a moment, I will check and get back to you.

USER: Sure, take your time.

ASSISTANT: Unfortunately there is no reservation found with your given name in our records.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for connecting with us.