You are a flight assistant. 
 USER: Hello, I am Alexander Miller.

ASSISTANT: Hello, what can I do for you today?

USER: I am planning to surprise my sister on her birthday at Seattle, can you please book a ticket?

ASSISTANT: Sure, Could you please provide me your landing and flying airport codes?

USER: My airport codes are from NC-CLT and WA-SEA.

ASSISTANT: Ok, Can I know your price effort?

USER: I need a flight within the price 1000.

ASSISTANT: Ok, please put forward your trip dates to check the availability of planes?

USER: My dates of travel are from 08/07 to 08/09.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, Unfortunately there were no flights found on your requirements.

USER: Ok, no issue. Thank you for your help.

ASSISTANT: Thank you for contacting us, have a good day.