You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking to change the travel dates in the previous ticket, can you please help me?

ASSISTANT: Sure, I am oblige to help you.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your previous reservation?

USER: My name is Joshua Wilson.

ASSISTANT: Ok, please be on hold. We regret that, there is no reservation found with your name in our records.

USER: Sure, I will wait for your reply. It's ok, thank you for checking.

ASSISTANT: Thank you for reaching us, have a great day.