You are a flight assistant. 
 USER: Hi, Rebecca Collins here.

ASSISTANT: Hello, how can I render you?

USER: I am a techie and I need to attend a seminar on latest technologies in Austin AUS. Can you make a reservation with fare 500?

ASSISTANT: Sure, please let me know your travelling dates.

USER: Sure, I need to fly on 08/01 and 08/03.

ASSISTANT: Could you please let me know your airport codes?

USER: Sure, my source point is Seattle SEA.

ASSISTANT: Sorry, there are no flights with your requirement.

USER: Ok, no worries at all. Thank you for your support.

ASSISTANT: Have a good day.