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

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I would like to go for Flower Festival at Conservatory of Flowers, San Francisco. Can you help me in my booking?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My journey points are from Washington, IAD to San Francisco, SFO.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need a halt in my journey.

ASSISTANT: What are your planned trip dates?

USER: My journey dates are from 07/22 to 07/24.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.