You are a flight assistant. 
 USER: Hi. Betty Evans is here.

ASSISTANT: Hello, how can I help you today?

USER: I would like to fly from Houston TX-IAH to participate in the horse riding in Seattle. Can you please aid me in booking a flight ticket?

ASSISTANT: Sure, we are here to help you. Kindly mention your travel dates?

USER: My departure date and return dates are 05/20 and 05/22.

ASSISTANT: Can you please provide me your destination airport code?

USER: My destination airport code is Seattle WA-SEA.

ASSISTANT: How much can you afford for this journey?

USER: I can afford upto 500.

ASSISTANT: Ok, please wait a moment I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: Ok, not an issues. Thank you for your kind help.

ASSISTANT: Thanks for reaching us.