You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Taylor.

ASSISTANT: How can I assist you today?

USER: I want to attend a wedding in Chicago. Can you book a ticket from SFO to ORD?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I want to travel on 09/24 and 09/26.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Welcome, have a great day.