You are a flight assistant. 
 USER: Hello. Donald Perez here.

ASSISTANT: Hello. How may I help you today?

USER: I need to travel from HOU to BOS. To meet my brother, can you help me?

ASSISTANT: Sure, I am happy to help you with that. Cloud you send me your travelling dates?

USER: My journey dates are Oct 04 to Oct 06.

ASSISTANT: Do you have any other specifications?

USER: My departure time is in evening.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.