You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kathleen Allen.

ASSISTANT: Can you please let me know what help you are looking for?

USER: Can you book a ticket from SEA to SFO?

ASSISTANT: Ok, I can help you. Can you please share your travelling dates?

USER: Thank you, I am planning my trip on 07/26 and back on 07/28.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry Allen, there is no flight found on the dates you provided.

USER: Ok, no problem with that one, thank you for your search and providing your information.

ASSISTANT: You are welcome. Thank you for consulting us.