You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Eric Davis.

ASSISTANT: How can I assist you now?

USER: I have made a previous booking to Seattle but the trip got changed to Houston, can you please help me in changing my previous flight ticket?

ASSISTANT: Sure, I will help you.

USER: Thank you so much.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: It's alright.

ASSISTANT: I am sorry to inform you that, there is no reservation found on your name to change.

USER: Not an issues with that one, thank you for providing the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.