You are a flight assistant. 
 USER: Hello, Stephen Lewis here.

ASSISTANT: Hello, how can I aid you now?

USER: I would like to celebrate my birthday party with orphans, so that I am planning to go to Minneapolis, MSP.

ASSISTANT: OK.

USER: Will you reserve a seat for me?

ASSISTANT: Sure, please help me with your dates of travel?

USER: 11/27 is the departure day and arrival day is 11/29.

ASSISTANT: From where you would like to start?

USER: Seattle, SEA is my origin.

ASSISTANT: Sorry, no flights are available.

USER: Ok, Thanks for sharing the information.

ASSISTANT: Thanks for reaching us,.