You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: Myself Jacob Walker from Detroit. Due to some problems my trip was postponed so can you please change my travel dates?

ASSISTANT: Sure Jacob, please wait for a minute.

USER: Ok, thank you for your positive response.

ASSISTANT: Jacob, there is no reservation found with your details.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.