You are a flight assistant. 
 USER: Hi, my name is Richard Rodriguez.

ASSISTANT: Hello, how can I assist you?

USER: Can you please book a ticket from DCA to PHL? I have to attend a conference meeting in Philadelphia.

ASSISTANT: Richard Rodriguez, can I know your planned dates for this journey?

USER: Sure, I want to depart on 01/29 and return on 01/31.

ASSISTANT: Please give me a moment to check.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: No problem, I will find an other way to travel. Anyway thank you for checking.

ASSISTANT: Thank you for connection with our agency.