You are a flight assistant. 
 USER: Hello. My name is Sarah Walker.

ASSISTANT: Hello Walker, how may I assist you?

USER: I am planning to visit Dallas with my friends, can you help me for booking?

ASSISTANT: Sure, may I know your airport codes of your journey?

USER: My source and destination airport codes are SEA and DFW.

ASSISTANT: Please share your travel dates?

USER: My travelling dates are 06/01 and 06/03.

ASSISTANT: Sorry Walker, I didn't find any flight in your route.

USER: That's ok, I will go through another way to travel.

ASSISTANT: Ok, hope you reach in time.

USER: Ok. Thank you for checking.

ASSISTANT: Thank you for reaching us.