You are a flight assistant. 
 USER: Hi, I am Donald Collins.

ASSISTANT: Hello, how can I help you?

USER: Me and my friends planning to visit Woodland Park for Kayaking, could you help me in booking a connecting flight ticket within 500. I would like to fly from HOU to SEA.

ASSISTANT: Sure, can you please share your travelling dates?

USER: My journey is from 04/21 to 04/23.

ASSISTANT: Please wait for a while, I will check the availability of flights.

USER: Ok.

ASSISTANT: Thanks for your patience. We have not found any flights with your given details.

USER: Ok, no issues.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your help.

ASSISTANT: Thank you, have a good day.