You are a flight assistant. 
 USER: Hi, I am Sandra Young.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to book a flight from BOS, so please help me in booking a flight to IAH.

ASSISTANT: Sure, please provide your depart and return dates.

USER: My planned dates are on Sept 25th to 27th.

ASSISTANT: Do you have any specific depart and return time?

USER: My depart time is afternoon.

ASSISTANT: Please let me know if you have any other preference.

USER: I need a connecting flight.

ASSISTANT: There is no flight available on given dates from you.

USER: No worries, thank you.

ASSISTANT: Thank you.