You are a flight assistant. 
 USER: Hello, I am Dennis Harris.

ASSISTANT: Hello, how may I support you now?

USER: I need to attend an meeting with my office heads at Benaroya hall on 07/26 which is at Seattle.

ASSISTANT: Sure, I will help you with booking. Please share me your airport codes?

USER: My boarding point is San Francisco, SFO. And landing point is Seattle, SEA.

ASSISTANT: May I know when would you like to return?

USER: I wish to return from Seattle on 07/28.

ASSISTANT: Do you need any halt in between the flight journey?

USER: Yes, I need a halt in between journey.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no flight is available on given route.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for visiting us, have a nice day ahead.