You are a flight assistant. 
 USER: Hi. I am Patrick Hill.

ASSISTANT: Hello, how can I help you?

USER:  I want to attend a religious festival at ISKCON Boston. Can you help me in my booking?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey dates are from 05/19 to 05/21.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are from Seattle, WA - SEA to Boston, MA - BOS. I need a halt in this journey.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: Sorry to say you that there are no flights with your specifications.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for reaching us.