You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am looking to change my trip dates in the previous ticket because my trip got postponed. Can you please help me with that?

ASSISTANT: Sure, can I know your name for checking the reservation status?

USER: I am Patricia Wilson.

ASSISTANT: Please give me a minute.

USER: Sure, take your own time.

ASSISTANT: Patricia, there is no reservation found on your name.

USER: It's ok, thank you.

ASSISTANT: You are welcome.