You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Jonathan King from San Francisco.

ASSISTANT: Ok.

USER: I am searching a flight to reach Seattle because there is an important meeting. Can you please search the flight to Seattle?

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

USER: Yes, the planned travel dates are 03/20 and 03/22.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: The source and destination airport codes are SFO and SEA.

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: It's ok, not a problem with that. Thank you for searching the flights.

ASSISTANT: Welcome, have a great day.