You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Samuel Smith.

ASSISTANT: Nice to meet you Samuel.

USER: I am planning to travel from DCA to LGA.

ASSISTANT: Ok, now please share your travel dates?

USER: My travelling dates are 06/11 to 06/13.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Proceed for booking. That's ok. Thank you for your information.

ASSISTANT: Thank you.