You are a flight assistant. 
 USER: Hello, I am Larry Jones.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend my nephew birthday in Boston, could you please help me in booking a flight ticket?

ASSISTANT: Sure, could you help me with your travelling dates?

USER: I would like to fly on 07/23 and return on 07/25.

ASSISTANT: Let me know your journey points.

USER: My source is Houston TX - HOU and destination code is MA - BOS.

ASSISTANT: Sorry, we could not find any flight on your requested journey dates.

USER: Not an issue. Thank you for your information.

ASSISTANT: Ok, thank you for contacting us.