You are a flight assistant. 
 USER: Hello, I am Mark Martinez.

ASSISTANT: Hello, how may I be your helping hand today?

USER: Would you please check the availability of flight to Oakland to Seattle?

ASSISTANT: Sure, to check the availability may I know your journey dates?

USER: Yes, I will fly on 03/29 and recur on 03/31. I want a connected flight which price limit is within 5000.

ASSISTANT: Ok, can you please share your airport codes?

USER: SEA and OAK will be my airport codes.

ASSISTANT: Ok, please wait for a while, I will check and let you know the best one.

USER: Ok.

ASSISTANT: We are glad to inform you that we found a flight with the fare of 100 and single connection.

USER: Ok, you can book it.

ASSISTANT: Sure, the booking has been done with 1028 Delta airline.

USER: Thanks for booking.

ASSISTANT: Thank you for availing us.