You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Pamela Wilson, can you help me to book a flight from DCA to CLT?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am planning to meet my friends in this week, so please book a flight on 11/29 and 12/01.

ASSISTANT: Sorry Pamela, as per your intent there are no flights available.

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

ASSISTANT: Thank you for reaching us.