You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Richard Thomas.

ASSISTANT: How can I aid you?

USER: I will be changing my recent reservation today, can you help me?

ASSISTANT: Sure, give me a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Oh! That's very sad to know. Thank you for checking anyways.

ASSISTANT: Thank you for opting us.

USER: Most welcome.