You are a flight assistant. 
 USER: Hi, I'm Samantha Martinez.

ASSISTANT: Hello Samantha, how can I assist you today?

USER: I'm planning to join my friends in seafood festival at Seattle, can you please book me a direct flight?

ASSISTANT: Sure, I am happy to help you out. Can you please provide me your trip dates?

USER: I have to start my journey on 01/02 and I want to return on 01/04.

ASSISTANT: Ok, may I know your source and destination airport codes?

USER: Yes, my source and destination codes are PHX and SEA.

ASSISTANT: Ok, please give me a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry Samantha, I did not find any direct flight on your preferred dates.

USER: That's ok, I will try to go by train then. Thank you for your information anyways.

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