You are a flight assistant. 
 USER: Hi, Donna Young here.

ASSISTANT: Hello, Donna. What can I do for you today?

USER: I want to attend my sister's birthday party in MA-BOS, can you please help me to book a ticket from TX-HOU?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are from 08/10 to 08/12.

ASSISTANT: Donna, please wait for a moment, I will try to provide you the best service.

USER: Sure, thank you for that.

ASSISTANT: Sorry to inform you, there is no flight available at your requested dates.

USER: That's fine, thank you for checking.

ASSISTANT: Do you want to fly with another dates?

USER: No, I will find an another way for travel.

ASSISTANT: Thank you for reaching us.Have a good day.