You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I provide assistance to you now?

USER: Can you please alter my earlier reservation? Because my scheduled dates for cultural program are delayed.

ASSISTANT: Sure. To alter your reservation may I have your name please?

USER: You can check with the name Ashley Johnson.

ASSISTANT: Ok, wait a while.

USER: Sure.

ASSISTANT: I will check with your previous reservation, and let you know the details.

USER: Ok.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: You have no reservation found with your name.

USER: Ok, Thanks for the information.

ASSISTANT: Thank you for opting us.